#
# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Test grounding of predicates.

@Engine("presto");

T0(0);
@Ground(Extend);
Extend(x) :- T(x) | (m Max= (z :- T(z)), x == m + 1);

T1 := Extend(T: T0);
T2 := Extend(T: T1);
T3 := Extend(T: T2);
T4 := Extend(T: T3);
T5 := Extend(T: T4);
T6 := Extend(T: T5);

@OrderBy(Test, "col0");
Test := T6();